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sandhill St. Johnswort

mountain St. John's wort

Habit Shrubs, decumbent, straggling and rooting, forming low, rounded clumps or mats, 1–5 dm. Shrubs, decumbent, spreading and rooting, wiry, branches ascending to erect, forming compact mats, 0.5–4.5 dm.
Stems

internodes (4-) or 6-lined at first, then terete.

internodes 4-lined.

Leaf

blades linear-subulate, 13–25 × 0.5–0.8 mm, base articulated, parallel, margins revolute, apex rounded to retuse, midrib unbranched.

blades oblong or elliptic to obovate, 4–25 × 2–12 mm, base not articulated, cuneate, margins plane, apex rounded, midrib with 2–4 pairs of branches.

Inflorescences

narrowly pyramidal, 1–3-flowered, with 1–3(–5)-flowered dichasia from to 5 proximal nodes, without additional flowering branches;

pedicels 0.5 mm.

1(–5)-flowered.

Flowers

12–14 mm diam.;

sepals deciduous, not enclosing capsule, 5, linear-subulate, unequal, (3–)4.5–7 × 0.5–0.8 mm;

petals 5, golden yellow, oblanceolate-oblong, 5–7.5 mm;

stamens deciduous, 100;

ovary 3-merous.

20–25 mm diam.;

sepals persistent, not enclosing capsule, 5, broadly elliptic to elliptic-spatulate or obovate, subequal, 4–5 × 2.5–3 mm;

petals 5, golden yellow, oblanceolate, 6–10.5 mm;

stamens persistent, 100;

ovary 3-merous.

Capsules

ovoid, 3–4 × 2–2.5 mm.

ovoid to ovoid-cylindric, 8–12 × 5 mm.

Seeds

carinate, 0.7 mm;

testa not seen.

narrowly to broadly carinate, 1.5–2 mm;

testa finely foveolate-reticulate.

Hypericum lloydii

Hypericum buckleyi

Phenology Flowering summer (Aug). Flowering early–mid summer (Jun–Jul).
Habitat Dry habitats (pine woods, granite outcrops, roadside embankments), inner coastal plain and foothills Seepage areas, moist rock crevices, ditches, road embankments
Elevation 100–300 m (300–1000 ft) 900–1600 m (3000–5200 ft)
Distribution
from FNA
AL; GA; NC; SC
[WildflowerSearch map]
[BONAP county map]
from FNA
GA; NC; SC
[BONAP county map]
Discussion

The habit, leaf shape, and drier habitats distinguish Hypericum lloydii from H. galioides.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Hypericum buckleyi is found throughout the southern Appalachian Mountains.

The decumbent habit and persistent sepals and stamens distinguish Hypericum buckleyi from its nearest relative, H. prolificum.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 6, p. 79. FNA vol. 6, p. 81.
Parent taxa Hypericaceae > Hypericum > sect. Myriandra Hypericaceae > Hypericum > sect. Myriandra
Sibling taxa
H. adpressum, H. anagalloides, H. apocynifolium, H. ascyron, H. boreale, H. brachyphyllum, H. buckleyi, H. canadense, H. canariense, H. chapmanii, H. cistifolium, H. concinnum, H. crux-andreae, H. cumulicola, H. densiflorum, H. denticulatum, H. dolabriforme, H. drummondii, H. edisonianum, H. ellipticum, H. erythreae, H. fasciculatum, H. frondosum, H. galioides, H. gentianoides, H. graveolens, H. gymnanthum, H. harperi, H. hypericoides, H. kalmianum, H. lissophloeus, H. lobocarpum, H. maculatum, H. majus, H. microsepalum, H. mutilum, H. myrtifolium, H. nitidum, H. nudiflorum, H. paucifolium, H. perforatum, H. prolificum, H. pseudomaculatum, H. punctatum, H. radfordiorum, H. scouleri, H. setosum, H. sphaerocarpum, H. suffruticosum, H. tenuifolium, H. tetrapetalum, H. virgatum, H. ×mitchellianum
H. adpressum, H. anagalloides, H. apocynifolium, H. ascyron, H. boreale, H. brachyphyllum, H. canadense, H. canariense, H. chapmanii, H. cistifolium, H. concinnum, H. crux-andreae, H. cumulicola, H. densiflorum, H. denticulatum, H. dolabriforme, H. drummondii, H. edisonianum, H. ellipticum, H. erythreae, H. fasciculatum, H. frondosum, H. galioides, H. gentianoides, H. graveolens, H. gymnanthum, H. harperi, H. hypericoides, H. kalmianum, H. lissophloeus, H. lloydii, H. lobocarpum, H. maculatum, H. majus, H. microsepalum, H. mutilum, H. myrtifolium, H. nitidum, H. nudiflorum, H. paucifolium, H. perforatum, H. prolificum, H. pseudomaculatum, H. punctatum, H. radfordiorum, H. scouleri, H. setosum, H. sphaerocarpum, H. suffruticosum, H. tenuifolium, H. tetrapetalum, H. virgatum, H. ×mitchellianum
Synonyms H. galioides var. lloydii
Name authority (Svenson) W. P. Adams: Contr. Gray Herb. 189: 32. (1962) M. A. Curtis: Amer. J. Sci. Arts 44: 80. (1843)
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